1、BSI Standards PublicationCable networks for television signals, sound signals and interactive servicesPart 2-2: Interference issues for DVB-T reception in the presence of LTE base station signalsPD CLC/TR 50083-2-2:2014National forewordThis Published Document is the UK implementation of CLC/TR 50083
2、-2-2:2014.The UK participation in its preparation was entrusted by Technical Com-mittee EPL/100, Audio, video and multimedia systems and equipment, to Subcommittee EPL/100/4, Cable distribution equipment and systems.A list of organizations represented on this committee can be obtained onrequest to i
3、ts secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 87206 8ICS 33.060.40; 33.100.01Compliance with a Britis
4、h Standard cannot confer immunity fromlegal obligations.This Published Document was published under the authority of theStandards Policy and Strategy Committee on 31 October 2014.Amendments issued since publicationDate Text affectedPUBLISHED DOCUMENTPD CLC/TR 50083-2-2:2014TECHNICAL REPORT RAPPORT T
5、ECHNIQUE TECHNISCHER BERICHT CLC/TR 50083-2-2 October 2014 ICS 33.060.40; 33.100.01 English Version Cable networks for television signals, sound signals and interactive services - Part 2-2: Interference issues for DVB-T reception in the presence of LTE base station signals Rseaux de distribution par
6、 cbles pour signaux de tlvision, signaux de radiodiffusion sonore et services interactifs - Partie 2-2: Problmes de perturbations concernant la rception de signaux DVB-T en prsence de signaux mis par les stations de base LTE Kabelnetze fr Fernsehsignale, Tonsignale und interaktive Dienste - Teil 2-2
7、: Straspekte fr den DVB-T-Empfang unter Einwirkung von LTE-Basisstations-Signalen This Technical Report was approved by CENELEC on 2014-10-13. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, F
8、ormer Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotech
9、nical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No
10、. CLC/TR 50083-2-2:2014 E PD CLC/TR 50083-2-2:2014CLC/TR 50083-2-2:2014 - 2 - Contents Foreword 3 1 Scope 4 1.1 General . 4 1.2 Specific scope of CLC/TR 50083-2-2 4 2 Normative references . 5 3 Term, definitions, symbols and abbreviations . 5 3.1 Terms and definitions 5 3.2 Abbreviations 7 3.3 Symbo
11、ls 8 4 Implications of the LTE service in the 800 MHz band . 8 4.1 Frequency allocation of LTE signals in the 800 MHz band . 8 4.2 Propagation models 8 4.3 LTE-UE field strength in the 800 MHz band. 9 4.4 LTE-BS field strength in the 800 MHz band . 9 5 Protection of television signals with respect t
12、o the LTE service 10 5.1 Provisions to be applied 10 5.2 EMC protection with respect to LTE-UE signals 10 5.3 EMC protection with respect to LTE-BS signals. 11 6 Additional EMC requirements with respect to LTE-UE disturbing field 13 7 Additional EMC requirements with respect to LTE-BS disturbing fie
13、ld. 13 7.1 General . 13 7.2 Worst case 13 7.3 Intermediate case . 14 7.4 Typical case 15 8 Typical LTE filter specifications 16 9 Measurements to determine the required attenuation for the LTE filter . 18 Bibliography . 19 PD CLC/TR 50083-2-2:2014- 3 - CLC/TR 50083-2-2:2014 Foreword This document (C
14、LC/TR 50083-2-2:2014) has been prepared by CLC/TC 209 “Cable networks for television signals, sound signals and interactive services”. This document is currently submitted to voting in accordance with the Internal Regulations, Part 2, Subclause 11.4.3.3 (simple majority) for acceptance as a CENELEC
15、Technical Report. PD CLC/TR 50083-2-2:2014CLC/TR 50083-2-2:2014 - 4 - 1 Scope 1.1 General Standards and deliverables of EN 50083 (all parts) and EN 60728 (all parts) deal with cable networks including equipment and associated methods of measurement for headend reception, processing and distribution
16、of television and sound signals and for processing, interfacing and transmitting all kinds of data signals for interactive services using all applicable transmission media. These signals are typically transmitted in networks by frequency-multiplexing techniques. For instance, this includes a) region
17、al and local broadband cable networks, b) extended satellite and terrestrial television distribution systems, c) individual satellite and terrestrial television receiving systems, and all kinds of equipment, systems and installations used in such cable networks, distribution and receiving systems. T
18、he extent of this standardization work is from the antennas and/or special signal source inputs to the headend or other interface points to the network up to the terminal input of the customer premises equipment. The standardization work will consider coexistence with users of the RF spectrum in wir
19、ed and wireless transmission systems. The standardization of any user terminals (i.e. tuners, receivers, decoders, multimedia terminals etc.) as well as of any coaxial, balanced and optical cables and accessories thereof is excluded. 1.2 Specific scope of CLC/TR 50083-2-2 The radiated fields produce
20、d by LTE Base Stations (LTE-BS) need special and careful attention when received by individual or community antenna television systems because of high level signals injected at the input port of wideband amplifiers placed on the antenna mast or in the headend. These high level disturbing signals in
21、the 800 MHz band are able to cause interference problems by producing overload and/or strong intermodulation products in wide band amplifiers and to disturb or even prevent the reception of digital television signals (DVB-T) broadcast in VHF/UHF bands. This interference problem, in a frequency band
22、previously assigned to terrestrial television broadcasting and now to broadband telecommunication services, can be avoided or reduced both with an appropriate suitable screening efficiency of cable network and equipment and by using an appropriate and suitable filter (LTE filter) to attenuate the 80
23、0 MHz band signals received by the television antenna system and injected (conducted interference) at the input port of wideband amplifiers. Some examples of EMC requirements relating to LTE-BS disturbing signals are described (see Clause 7) and the main characteristics of a typical LTE filter (see
24、Clause 8) are indicated. These additional EMC requirements for cable networks and equipment, resulting from the assignment of the 800 MHz band to LTE services, are based on: a) the expected field strengths in the 800 MHz band due to both LTE User Equipment (LTE-UE) and LTE Base Station (LTE-BS), con
25、sidered as disturbing signals; b) the field strengths planned for terrestrial television broadcasting in the UHF band, up to 790 MHz (e.g. ch. 60), c) the required protection of television signals with respect to both LTE-UE and LTE-BS disturbing fields. PD CLC/TR 50083-2-2:2014- 5 - CLC/TR 50083-2-
26、2:2014 Both LTE-BS disturbing effects and LTE-UE disturbance effects and protection requirements are therefore considered in this technical report. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its applicati
27、on. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50083-2, Cable networks for television signals, sound signals and interactive services - Part 2: Electromagnetic compatibility for eq
28、uipment IEC 60050-161, International Electrotechnical Vocabulary (IEV) - Chapter 161: Electromagnetic compatibility CEPT Report 30:2009, The identification of common and minimal (least restrictive) technical conditions for 790 - 862 MHz for the digital dividend in the European Union 3 Term, definiti
29、ons, symbols and abbreviations 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60050-161 and the following apply. 3.1.1 CATV network originally defined as Community Antenna Television network; now covering regional and local broadband cable network
30、s, designed to provide sound and television signals as well as signals for interactive services to a regional or local area 3.1.2 electromagnetic-active equipment all passive and active equipment carrying RF signals is considered as electromagnetic-active equipment because it is liable to cause elec
31、tromagnetic disturbances or the performance of them and is liable to be affected by such disturbances 3.1.3 extended satellite television distribution networks or systems distribution networks or systems designed to provide sound and television signals received by satellite receiving antenna to hous
32、eholds in one or more buildings Note 1 to entry: This kind of network or system could eventually be combined with terrestrial antennas for the additional reception of TV and/or radio signals via terrestrial networks. Note 2 to entry: This kind of network or system could also carry control signals fo
33、r satellite switched systems or other signals for special transmission systems (e.g. MoCA or WiFi) in the return path direction. 3.1.4 extended terrestrial television distribution networks or systems distribution networks or systems designed to provide sound and television signals received by terres
34、trial receiving antenna to households in one or more buildings Note 1 to entry: This kind of network or system could eventually be combined with a satellite antenna for the additional reception of TV and/or radio signals via satellite networks. Note 2 to entry: This kind of network or system could a
35、lso carry other signals for special transmission systems (e.g. MoCA or WiFi) in the return path direction. PD CLC/TR 50083-2-2:2014CLC/TR 50083-2-2:2014 - 6 - 3.1.5 individual satellite television receiving systems systems designed to provide sound and television signals received from satellite(s) t
36、o an individual household Note 1 to entry: This kind of system could also carry control signals for satellite switched systems or other signals for special transmission systems (e.g. MoCA or WiFi) in the return path direction. 3.1.6 individual terrestrial television receiving systems systems designe
37、d to provide sound and television signals received via terrestrial broadcast networks to an individual household Note 1 to entry: This kind of system could also carry other signals for special transmission systems (e.g. MoCA or WiFi) in the return path direction. 3.1.7 local broadband cable networks
38、 networks designed to provide sound and television signals as well as signals for interactive services to a local area (e.g. one town or one village) 3.1.8 LTE Long Term Evolution service for broadband telecommunication networks 3.1.9 LTE-BS Base Station used in Long Term Evolution service for broad
39、band telecommunication networks 3.1.10 LTE-UE User Equipment used in Long Term Evolution service for broadband telecommunication networks 3.1.11 MATV networks originally defined as Master Antenna Television networks, now covering extended terrestrial television distribution networks or systems desig
40、ned to provide sound and television signals received by terrestrial receiving antenna to households in one or more buildings Note 1 to entry: This kind of network or system could eventually be combined with a satellite antenna for the additional reception of TV and/or radio signals via satellite net
41、works. Note 2 to entry: This kind of network or system could also carry other signals for special transmission systems (e.g. MoCA or WiFi) in the return path direction. 3.1.12 regional broadband cable networks networks designed to provide sound and television signals as well as signals for interacti
42、ve services to a regional area covering several towns and/or villages PD CLC/TR 50083-2-2:2014- 7 - CLC/TR 50083-2-2:2014 3.1.13 SMATV networks originally defined as Satellite Master Antenna Television networks, now covering extended distribution networks or systems designed to provide sound and tel
43、evision signals received by satellite receiving antenna to households in one or more buildings Note 1 to entry: This kind of network or system could eventually be combined with terrestrial antennas for the additional reception of TV and/or radio signals via terrestrial networks. Note 2 to entry: Thi
44、s kind of network or system could also carry control signals for satellite switched systems or other signals for special transmission systems (e.g. MoCA or WiFi) in the return path direction. 3.2 Abbreviations For the purposes of this document, the following abbreviations are used. AM Amplitude Modu
45、lation BER Bit Error Ratio BS Base Station CATV Community Antenna Television (network) ch. Channel DOCSIS Data Over Cable Service Interface Specification e.m. Electromagnetic EMC Electromagnetic Compatibility EMI Electromagnetic Interference EuroDOCSIS European Data Over Cable Service Interface Spec
46、ification EUT Equipment Under Test LO Local Oscillator LTE Long Term Evolution LTE-BS Long Term Evolution Base Station LTE-UE Long Term Evolution User Equipment MoCA Multimedia over Cable Alliance RBW Resolution Bandwidth RF Radio Frequency TDMA Time Division Multiple Access TV Television UE User Eq
47、uipment WiFi Synonym of WLAN PD CLC/TR 50083-2-2:2014CLC/TR 50083-2-2:2014 - 8 - 3.3 Symbols For the purposes of this document, the following graphical symbols are used. These symbols are either listed in IEC 60617 (all parts) or based on symbols defined in IEC 60617 (all parts). Graphical symbol Re
48、ference number and title Graphical symbol Reference number and title Receiving antenna Amplifier IEC 60617 S01239 Low pass filter IEC 60617 SO1248 Band-pass filter IEC 60617 S01249 Level meter Stop-band filter IEC 60617 S01250 4 Implications of the LTE service in the 800 MHz band 4.1 Frequency alloc
49、ation of LTE signals in the 800 MHz band The frequency allocation of the LTE signals in the 800 MHz band is indicated in Figure 1. The downlink (from the LTE-BS (Base Station) to the LTE-UE (User Equipment) is allocated in the frequency range 791 MHz to 821 MHz, while the uplink (from LTE-UE to LTE-BS) is allocated in the frequency range 832 MHz to 862 MHz. The duplex gap, 11 MHz wide, is between 821 MHz and 832 MHz. The guard band, between the last TV channel 60 in the UHF broadcasting band and the mobile communications band, is only 1 MHz wide. Figure 1
